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參數資料
| 型號： | TDA10023HT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, PLASTIC, MS-026, SOT-357-1, TQFP-64 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 101K |
| 代理商： | TDA10023HT |
1.
General description
The TDA10023HT is a single chip DVB-C/MCNS channel receiver for 4, 16, 32, 64, 128
and 256-QAM modulated signals. The device interfaces directly to the IF signal, which is
sampled by a 10-bit A/D converter.
The TDA10023HT performs the clock and the carrier recovery functions. The digital loop
lters for both clock and carrier recovery are programmable in order to optimize their
characteristics according to the current application.
After baseband conversion, equalization lters are used for echo cancellation in cable
applications. These lters are congured as T-spaced transversal equalizer or DFE
equalizer, so that the system performance can be optimized according to the network
characteristics. A proprietary equalization algorithm, independent of carrier offset, is
achieved in order to assist carrier recovery. Then a decision directed algorithm takes
place, to achieve nal equalization convergence.
The TDA10023HT chip implements two FEC decoders, one for each standard. In the
DVB-C mode the TDA10023HT implements a Forney convolutional de-interleaver of depth
12 blocks and a Reed-Solomon decoder which corrects up to 8 erroneous bytes. The
de-interleaver and the Reed-Solomon decoder are automatically synchronized thanks to
the frame synchronization algorithm that uses the MPEG2 sync byte. Finally descrambling
according to DVB-C standard is achieved at the Reed-Solomon output. In the MCNS
mode the receiver error correction implements a soft decision trellis decoder to correct
random channel errors, a randomizer, a convolutional de-interleaver of depth I = 128, 64,
32, 16, 8 and J = 1, 2, 3, 4, 8, 16 for burst protection, and a Reed-Solomon decoder which
corrects up to 3 erroneous symbols. The de-interleaver and the Reed-Solomon decoder
are automatically synchronized using the frame sync trailer.
This device is controlled via an I2C-bus.
TDA10023HT
Single chip DVB-C/MCNS channel receiver
Rev. 01 — 12 April 2005
Product data sheet
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相關代理商/技術參數 |
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| TDA10023HT/C1,518 | 制造商:Entropic Communications 功能描述:935273244518-R43 |
| TDA10025 | 制造商:NXP 功能描述:Dual cable demodulator |
| TDA10025HN/C1,518 | 功能描述:調節器/解調器 Dual Cable (QAM) Demodulator RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA10025HN/C1,551 | 功能描述:調節器/解調器 DUAL CBL DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| TDA10025HN/C1,557 | 功能描述:調節器/解調器 DUAL CBL DEMODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
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